A range of positive surface retarders, water based, is available in 4 colors depending on the size of the aggregates to disable and depth of the desired attack. The active components of Masterfinish SRT 480 acting on the concrete surface, on a determined depth so as to retard curing. After cleaning with water, using a high pressure cleaner for professional use, the aggregates are apparent. The main areas of application are roads, pavements, pedestrian areas, sidewalks, patios, garage raids, private facilities, and traditional architectural concrete aggregate concrete.